don't allow an empty queue; just add one random track wnever the queue empties

music-api.py

@@ -175,6 +175,12 @@ def pick_station_id_file():
         return None
     return os.path.join(STATION_ID_DIR, random.choice(files))
 
+def pick_random_track():
+    """Return a random music track (relative path) from TRACKS."""
+    if not TRACKS:
+        return None
+    return random.choice(list(TRACKS.keys()))
+
 def set_rds(text: str):
     global rds_pipe
     try:
@@ -640,10 +646,14 @@ def worker():
                     empty = False
 
                 if empty:
-                write_silence(0.25)
-                time.sleep(0.5)
+                    track = pick_random_track()
+                    if track:
+                        print(f"[WORKER] Queue empty — adding random track: {track}")
+                        with queue_lock:
+                            queue.append(track)
                     continue
 
+
             # Shuffle only when building the play order
             if shuffle_mode:
                 with queue_lock: